scan.h

   1 #include <map>
   2
   3 #include <clang/Basic/SourceManager.h>
   4 #include <clang/AST/Decl.h>
   5 #include <clang/AST/Stmt.h>
   6 #include <clang/Lex/Preprocessor.h>
   7
   8 #include <isl/ctx.h>
   9 #include <isl/map.h>
  10
  11 #include "scop.h"
  12
  13 /* The location of the scop, as delimited by scop and endscop
  14  * pragmas by the user.
  15  */
  16 struct ScopLoc {
  17         ScopLoc() : end(0) {}
  18
  19         unsigned start;
  20         unsigned end;
  21 };
  22
  23 struct PetScan {
  24         clang::Preprocessor &PP;
  25         clang::ASTContext &ast_context;
  26         /* If autodetect is false, then loc contains the location
  27          * of the scop to be extracted.
  28          */
  29         ScopLoc &loc;
  30         isl_ctx *ctx;
  31         /* The sequence number of the next statement. */
  32         int n_stmt;
  33         /* The sequence number of the next virtual scalar. */
  34         int n_test;
  35         /* If autodetect is false, a scop delimited by pragmas is extracted,
  36          * otherwise we take any scop that we can find.
  37          */
  38         bool autodetect;
  39         /* Set if the pet_scop returned by an extract method only
  40          * represents part of the input tree.
  41          */
  42         bool partial;
  43         /* Set is nested accesses are allowed in general.
  44          * This currently defaults to true.
  45          */
  46         bool allow_nested;
  47         /* Set if nested accesses are allowed in that part of the tree
  48          * that is currently under investigation.
  49          */
  50         bool nesting_enabled;
  51         /* Maps identifiers to the last expression that was assigned to them.
  52          * If an identifier is mapped to NULL, then something may have
  53          * been assigned, but we don't know what.
  54          */
  55         std::map<clang::ValueDecl *, clang::Expr *> assigned_value;
  56
  57         PetScan(isl_ctx *ctx, clang::Preprocessor &PP,
  58                 clang::ASTContext &ast_context, ScopLoc &loc, int autodetect) :
  59                 ctx(ctx), PP(PP), ast_context(ast_context), loc(loc),
  60                 autodetect(autodetect),
  61                 n_stmt(0), n_test(0), partial(0), allow_nested(true),
  62                 nesting_enabled(false) { }
  63
  64         struct pet_scop *scan(clang::FunctionDecl *fd);
  65
  66         static int extract_int(clang::IntegerLiteral *expr, isl_int *v);
  67 private:
  68         struct pet_scop *scan(clang::Stmt *stmt);
  69
  70         struct pet_scop *scan_arrays(struct pet_scop *scop);
  71         struct pet_array *extract_array(isl_ctx *ctx, clang::ValueDecl *decl);
  72         struct pet_array *set_upper_bounds(struct pet_array *array,
  73                 const clang::Type *type, int pos);
  74
  75         struct pet_scop *extract_non_affine_condition(clang::Expr *cond,
  76                 __isl_take isl_map *access);
  77
  78         struct pet_scop *extract_conditional_assignment(clang::IfStmt *stmt);
  79
  80         struct pet_scop *extract(clang::Stmt *stmt);
  81         struct pet_scop *extract(clang::StmtRange stmt_range);
  82         struct pet_scop *extract(clang::IfStmt *stmt);
  83         struct pet_scop *extract(clang::WhileStmt *stmt);
  84         struct pet_scop *extract(clang::CompoundStmt *stmt);
  85
  86         struct pet_scop *extract(clang::Stmt *stmt, struct pet_expr *expr);
  87
  88         clang::BinaryOperator *initialization_assignment(clang::Stmt *init);
  89         clang::Decl *initialization_declaration(clang::Stmt *init);
  90         clang::ValueDecl *extract_induction_variable(clang::BinaryOperator *stmt);
  91         clang::VarDecl *extract_induction_variable(clang::Stmt *init,
  92                                 clang::Decl *stmt);
  93         bool check_unary_increment(clang::UnaryOperator *op,
  94                                 clang::ValueDecl *iv, isl_int &inc);
  95         bool check_binary_increment(clang::BinaryOperator *op,
  96                                 clang::ValueDecl *iv, isl_int &inc);
  97         bool check_compound_increment(clang::CompoundAssignOperator *op,
  98                                 clang::ValueDecl *iv, isl_int &inc);
  99         bool check_increment(clang::ForStmt *stmt, clang::ValueDecl *iv,
 100                                 isl_int &inc);
 101         struct pet_scop *extract_for(clang::ForStmt *stmt);
 102         struct pet_scop *extract_infinite_loop(clang::Stmt *body);
 103         struct pet_scop *extract_infinite_for(clang::ForStmt *stmt);
 104
 105         void mark_write(struct pet_expr *access);
 106         struct pet_expr *extract_expr(clang::Expr *expr);
 107         struct pet_expr *extract_expr(clang::UnaryOperator *expr);
 108         struct pet_expr *extract_expr(clang::BinaryOperator *expr);
 109         struct pet_expr *extract_expr(clang::ImplicitCastExpr *expr);
 110         struct pet_expr *extract_expr(clang::FloatingLiteral *expr);
 111         struct pet_expr *extract_expr(clang::ParenExpr *expr);
 112         struct pet_expr *extract_expr(clang::ConditionalOperator *expr);
 113         struct pet_expr *extract_expr(clang::CallExpr *expr);
 114
 115         struct pet_expr *resolve_nested(struct pet_expr *expr);
 116         struct pet_expr *extract_access_expr(clang::Expr *expr);
 117
 118         __isl_give isl_map *extract_access(clang::ArraySubscriptExpr *expr);
 119         __isl_give isl_map *extract_access(clang::Expr *expr);
 120         __isl_give isl_map *extract_access(clang::ImplicitCastExpr *expr);
 121         __isl_give isl_map *extract_access(clang::DeclRefExpr *expr);
 122         __isl_give isl_map *extract_access(clang::IntegerLiteral *expr);
 123
 124         __isl_give isl_pw_aff *extract_affine_add(clang::BinaryOperator *expr);
 125         __isl_give isl_pw_aff *extract_affine_div(clang::BinaryOperator *expr);
 126         __isl_give isl_pw_aff *extract_affine_mod(clang::BinaryOperator *expr);
 127         __isl_give isl_pw_aff *extract_affine_mul(clang::BinaryOperator *expr);
 128
 129         isl_pw_aff *non_affine(clang::Expr *expr);
 130
 131         bool is_affine(clang::Expr *expr);
 132         bool is_affine_condition(clang::Expr *expr);
 133
 134         __isl_give isl_pw_aff *extract_affine(const llvm::APInt &val);
 135         __isl_give isl_pw_aff *extract_affine(clang::Expr *expr);
 136         __isl_give isl_pw_aff *extract_affine(clang::IntegerLiteral *expr);
 137         __isl_give isl_pw_aff *extract_affine(clang::ImplicitCastExpr *expr);
 138         __isl_give isl_pw_aff *extract_affine(clang::DeclRefExpr *expr);
 139         __isl_give isl_pw_aff *extract_affine(clang::BinaryOperator *expr);
 140         __isl_give isl_pw_aff *extract_affine(clang::UnaryOperator *expr);
 141         __isl_give isl_pw_aff *extract_affine(clang::ParenExpr *expr);
 142         __isl_give isl_pw_aff *extract_affine(clang::CallExpr *expr);
 143         __isl_give isl_pw_aff *extract_affine(clang::ArraySubscriptExpr *expr);
 144         __isl_give isl_pw_aff *extract_affine(clang::ConditionalOperator *expr);
 145
 146         __isl_give isl_set *extract_implicit_condition(clang::Expr *expr);
 147
 148         __isl_give isl_set *extract_condition(clang::UnaryOperator *expr);
 149         __isl_give isl_set *extract_condition(clang::Expr *expr);
 150         __isl_give isl_set *extract_comparison(clang::BinaryOperator *expr);
 151         __isl_give isl_set *extract_comparison(clang::BinaryOperatorKind op,
 152                 clang::Expr *LHS, clang::Expr *RHS, clang::Stmt *comp);
 153         __isl_give isl_set *extract_boolean(clang::BinaryOperator *expr);
 154         __isl_give isl_set *extract_boolean(clang::UnaryOperator *expr);
 155
 156         void unsupported(clang::Stmt *stmt);
 157 };